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treacherous

treach·er·ous

treacherous

 
pronunciation:
tre ch rs
part of speech: adjective
definition 1: betraying or likely to betray trust; traitorous; faithless.
The treacherous officer betrayed his general.
antonyms:
faithful, loyal, trustworthy
similar words:
false, mutinous, unfaithful
definition 2: dangerous; risky.
The sea was treacherous in the storm.
antonyms:
safe
similar words:
dangerous, perilous, precarious, risky
derivations: treacherously (adv.), treacherousness (n.)